EP 0231989 A3 19881130 - MILLING TOOL FOR CUTTING WELL CASING
Title (en)
MILLING TOOL FOR CUTTING WELL CASING
Publication
Application
Priority
US 81628786 A 19860106
Abstract (en)
[origin: EP0231989A2] A milling tool (10) for progressively cutting away a section of casing (14) installed within a well from the upper annular end (12) of the casing (14). The milling tool (10) includes a plurality of elongate blades (32) equally spaced from each other at intervals between one and three inches about the periphery of the cylindrical body (18) of the milling tool (10). The blades (32) are inclined with respect to the axis of rotation and hard carbide cutting discs (34) arranged in horizontal rows on the blades (32) form the inclined leading planar face of the blades (32), and the lowermost row of discs (34) forms a cutting edge with a negative rake engaging the upper end (12) of the casing (14) in a cutting operation.
IPC 1-7
IPC 8 full level
B23B 5/16 (2006.01); E21B 29/00 (2006.01)
CPC (source: EP US)
B23B 5/168 (2013.01 - EP US); E21B 29/002 (2013.01 - EP US); Y10T 408/558 (2015.01 - EP US); Y10T 408/78 (2015.01 - EP US)
Citation (search report)
- [Y] GB 947440 A 19640122 - JERSEY PROD RES CO
- [Y] US 3059708 A 19621023 - CANNON GEORGE E, et al
- [A] US 2846193 A 19580805 - JACK CHADDERDON
- [A] US 3145790 A 19640825 - BRIDWELL HAROLD C, et al
- [A] US 3106973 A 19631015 - CHRISTENSEN FRANK L
- [A] US 2855994 A 19581014 - KAMMERER JR ARCHER W
- [A] US 3110084 A 19631112 - KINZBACH ROBERT B
- [A] EP 0086582 A1 19830824 - RED BARON OIL TOOLS RENTAL [GB]
Designated contracting state (EPC)
BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0231989 A2 19870812; EP 0231989 A3 19881130; AU 590374 B2 19891102; AU 6712687 A 19870709; CA 1325545 C 19931228; GB 2184963 A 19870708; GB 2184963 B 19900620; GB 8614488 D0 19860716; NO 177197 B 19950424; NO 870032 D0 19870105; NO 870032 L 19870707; SG 81090 G 19901123; US 4796709 A 19890110
DOCDB simple family (application)
EP 87300020 A 19870105; AU 6712687 A 19870105; CA 526679 A 19870105; GB 8614488 A 19860613; NO 870032 A 19870105; SG 81090 A 19901004; US 81628786 A 19860106